fix: 修复空指针和类型转换问题

kunlong-luo

2023-02-02 8f2ce95165f90e51d41b083610d00ae346f3a852

 src/main/java/com/genersoft/iot/vmp/common/VideoManagerConstants.java

@@ -70,6 +70,8 @@


   public static final String SYSTEM_INFO_DISK_PREFIX = "VMP_SYSTEM_INFO_DISK_";



   public static final String REGISTER_EXPIRE_TASK_KEY_PREFIX = "VMP_device_register_expire_";